Home Variable Frequency Drives Allen-Bradley VFDs MicroLogix 1200 to PowerFlex 4 using Modbus

MicroLogix 1200 to PowerFlex 4 using Modbus

February 9, 2004

This second program is based on the first, but uses the Modbus Master protocol available in the latest release of the MicroLogix 1200, as well as a 1761-Net-AIC.

The biggest obstacle in getting this configuration to work was trying to find the polarity of the comm lines (i.e. does + comm on the AIC go to A or B comm on the drive?) as well as realizing all the modbus addresses are offset by 1 (which even Rockwell Drives Div. missed in Rev 1 of the subsequently release tech note).

Since this file was published, Rockwell has release (and fixed) a tech note, and also has an excellent 2004 HOT LAB.

Requirements:

RSLogix 500 Version: 6.1
Additional Requirements: Micro1200 & PowerFlex 4 /40
File Size: 60 kb
Uploaded on: 02/09/04
Entered By: Shawn Michael Tierney

Download Link:

RSLogix 500 Ladder Micro1200 to PowerFlex 4 using Modbus

Until next time, Peace ✌️

Shawn M Tierney
Technology Enthusiast & Content Creator

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Shawn Tierney

Shawn is a lifelong Technology Enthusiast who as a pre-teen in the early 80's discovered his passion for programing on the newly released Apple II and VIC-20 computers. After earning a degree in Electronics, Shawn worked as a Certified Automation Specialist for 25 years before leaving to focus full time on teaching online PLC, HMI, and SCADA courses at The Automation School, as well as publishing industrial automation news, interviews, and how-to articles & videos at The Automation Blog.